from django.shortcuts import render, get_object_or_404
from django.http import HttpResponse, HttpResponseRedirect
from django.core.urlresolvers import reverse
from django.views import generic
# from django.template import RequestContext, loader
from django.http import Http404

from .models import Question, Choice
# Create your views here.


# def IndexView(generic.ListView):
    # latest_question_list = Question.objects.order_by('-pub_date')[:5]
    # template = loader.get_template('polls/index.html')
    # context = {'latest_question_list': latest_question_list}
    # output = ','.join([p.question_text for p in latest_question_list])
    # return render(request, 'polls/index.html', context)
# Code refactoring
class IndexView(generic.ListView):
    template_name = 'polls/index.html'
    context_object_name = 'latest_question_list'

    def get_queryset(self):
        """Return the last five published questions."""
        return Question.objects.order_by('-pub_date')[:5]


# def detail(request, question_id):
    # try:
    #     question = Question.objects.get(pk = question_id)
    # except Question.DoesNotExist:
    #     raise Http404('Question does not Exist!')
    # question = get_object_or_404(Question, pk=question_id)
    # return render(request, 'polls/detail.html', {'question': question})
class DetailView(generic.DetailView):
    model = Question
    template_name = 'polls/detail.html'


# def results(request, question_id):
#     question = get_object_or_404(Question, pk=question_id)
#     return render(request, 'polls/results.html', {'question': question})
class ResultsView(generic.DetailView):
    model = Question
    template_name = 'polls/results.html'


def vote(request, question_id):
    p = get_object_or_404(Question, pk=question_id)

    try:
        selected_choice = p.choice_set.get(pk=request.POST['choice'])
    except(KeyError, Choice.DoesNotExist):
        return render(request, 'polls/detail.html', {
            'question': p,
            'error_message': "You didn't select a choice."
        })
    else:
        selected_choice.votes += 1
        selected_choice.save()
        return HttpResponseRedirect(reverse('polls:results', args=(p.id,)))
